App Designer Needed

I'm planning to launch an app like Flappy bird that has more features.

This game is 2D

However, I'm not exactly a designer.
The theme is pixels so everything needs to be pixel themed.

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What I need:
- A Hell Styled Background (Pixelated)

• The background is basically hell, with lava on the bottom with rocks n stuff and on the top the same.
  

- A Helicopter with 2 Colours (Pixelated)

• The helicopter is basically a helicopter, pixelated but it has two main colours. 1 on the top, 1 on the bottom (excluding the main parts of it(the rotor, landing skids, tail rotor, rotor mast, etc)) Also, make the front of the helicopter face right (the other direction the image below is pointing)
  Like this: http://imgur.com/tjOMxI2
  

- A Hell Styled Flappy Bird Pipes Thing (Mostly Pixelated)

• The pipes are basically like pointing icicles but more hell styles and a bit more wide. (remember the game is like flappy bird)
  

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Thanks!
Because I don't have any money to pay you right now, I'll pay you with around 10%-50% of the games sales in the first 1-4 months. The percentage is based on how much the game is making. If I make $300 in the first 3 months I need $150 of that to pay off the enrollment payment (150AUD per year), so you will probably like $20-30. It varies on how much I get. Months is also varied on how much income is being made, if I make $500 in the first month thats when you'll get paid.
The very minimum you'll get is $10.

I'd say it's a pretty good deal for a simple graphic design